Performance analysis of a power network Counter-TEMPEST filter in realistic cabling scenarios

Spurious compromising electromagnetic emanations generated by critical systems can propagate along power cable network. This poses unacceptable risks for the security of sensitive information. In order to reduce such threat Counter-TEMPEST filters are introduced between the power network and the electronic device power socket. The loss insertions of these protections are directly related to the input impedance of connected devices and the impedance of the power network female socket. In this paper, the performances of a filter are analysed in practical configurations.